Tenant Wants to Add a Partner to Their Tenancy

I'm sure this has been asked before, possibly by myself (!), but if a tenant wishes for their partner to move into the property after the initial 6-month term, who is liable to pay?

Would it be a brand new tenancy and, therefore, down to the landlord to pay for a new tenancy?

Or, as the tenant requested, would they be liable to pay?

Would it be classed as an amendment to an existing tenancy?

View Related Handbook Page

Joint and Several Tenancies

Joint tenancies can be agreed upon with two or more people from the outset of the tenancy. Each can then be responsible jointly and severally (individually) for meeting the tenancy terms in full, including paying the rent. This is known as joint and several liability. Joint and several liability only arise where it is agreed upon. If nothing is agreed they will be jointly liable.